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  • Oily Sludge Treatment Principles Processes and Compliance Analysis

    Oily sludge is one of the primary solid wastes generated during oil and gas extraction and petroleum refining, typically appearing as a black solid or semi-fluid substance. Its composition is complex, generally consisting of crude oil, water, and inorganic solid particles such as sand and drilling cuttings. The stable emulsified structure formed between the oil, water, and solids results in high viscosity, which increases the difficulty of separation. With the widespread application of tertiary oil recovery technologies (primarily chemical flooding), the properties of crude oil have evolved, leading to even more intricate oily sludge components. Under the current green and low-carbon initiative, petroleum and petrochemical enterprises face significant pressure regarding low-cost treatment and stable environmental compliance. Consequently, the oily sludge treatment sector requires a new wave of technological upgrades and process innovations.
     
    Core Challenges in Oily Sludge Treatment
     
    The primary objective of oily sludge treatment is to achieve efficient three-phase separation and purification of "oil, water, and solids" while ensuring the final products meet environmental regulations. The main challenges include:

    Stable Emulsion Structure: Under the action of surfactants, the oil and water phases form stable emulsions that are difficult to break through conventional settling or physical means.
    Lipophilicity of Solid Particles: The surfaces of solids are often coated with an oil film, which negatively affects the oil recovery rate and the cleanliness of the solid phase.
    Environmental Compliance Pressure: National standards for hazardous waste disposal are becoming increasingly stringent, requiring extremely low Oil on Cuttings (OOC) or residual oil content in solids before safe disposal.
     
    Analysis of Mainstream Oil Sludge Treatment Technologies
     
    The industry currently employs several technical routes to address these challenges:

    Physical Separation: Relies on gravity, centrifugal force, or filtration. For example, a centrifuge separates oil, water, and solids of different densities via high-speed rotation. This is often used as a pre-treatment or in combination with other methods.
    Chemical Treatment and Hot Washing: One of the most widely applied routes. The core principle involves using chemical agents (e.g., demulsifiers, surfactants, cleaning agents) combined with heating to break the emulsion and reduce the adhesion between oil and solids, stripping the oil from the solid surfaces. This process significantly improves oil recovery and reduces the oil content in solids.
    Biological Treatment: Utilizes specific microorganisms to degrade hydrocarbons in the sludge. This method has a long treatment cycle and is highly sensitive to environmental factors, making it suitable for low-oil-content sludge or deep remediation scenarios.
    Thermal Treatment (Pyrolysis and Incineration): Involves high-temperature environments. Incineration completely oxidizes organic matter, while pyrolysis thermally cracks organics into oil/gas and coke under anaerobic conditions. It ensures thorough decontamination but requires high investment and energy consumption.

     
    Treatment Efficiency and Compliance Requirements
     
    The value of a successful oily sludge treatment system is measured by its output. In 2026, ideal results must ensure that all phases meet the latest industry standards:

    Solid Residue: The residual oil content should be far below hazardous waste exemption standards, allowing for safe landfilling, pyrolysis, or resource utilization, which significantly lowers disposal costs.
    Liquid Phase (Effluent): The oil content in the water must meet recycling or discharge standards. In oilfield operations, clear water is typically required for reuse in cleaning processes, achieving an internal water cycle.
    Oil Recovery: The recovered oil should have high purity and be suitable for direct sale as raw material, creating economic value.
     
    KOSUN 1m³/h Oily Sludge Treatment System Industrial Applications
     
    Efficient oily sludge treatment systems are widely used for treating oilfield floor sludge, drilling waste, tank cleaning residues, and oily wastewater silt.
    KOSUN’ s 1m³/h Integrated Oily Sludge Treatment System is a solution that integrates advanced chemical hot washing technology with high-efficiency centrifugal separation units. The system is dedicated to achieving the reduction, harmlessness, and resource recovery of oily sludge, helping enterprises meet strict environmental compliance requirements while unifying economic and environmental benefits.

  • Trenchless Mud Management Technical Challenges and KOSUN Mud Recovery Solutions

    Trenchless Technology, as an efficient and low-disturbance method for underground pipeline installation, is being increasingly adopted in urban infrastructure development. It effectively avoids traditional road excavation, minimizing disruptions to traffic, the environment, and urban landscapes.
    However, mud (drilling fluid) management during trenchless construction is a critical factor for project success and environmental compliance. As an essential medium, drilling mud performs vital functions such as carrying cuttings, cooling drilling tools, and stabilizing borehole walls. Efficiently processing used mud is a challenge that every construction unit must address.
     

    Application Scenarios and Technical Requirements
     
    Trenchless engineering is applied across a wide range of environments, from bustling city centers to ecologically sensitive areas. These projects demand high standards for environmental protection and operational efficiency.
    Urban Pipe Network Renovation: Laying water, electricity, gas, and communication pipelines without interrupting traffic.
    River Crossing Projects: Performing directional drilling beneath riverbeds, where "zero discharge" requirements for mud are extremely stringent.
    Municipal Road Construction: Avoiding damage to existing pavement structures and landscaping.
    The traditional "single-use" mud model has numerous drawbacks: high mud consumption, expensive transport and disposal costs, messy construction sites, and significant environmental compliance risks. Therefore, establishing an efficient Mud Circulation System is essential.
     
    Working Principle of the HDD Mud Circulation System
     
    A HDD Mud Circulation System is specialized equipment that purifies drilling fluid using physical separation principles. Its core objective is to separate solid particles (cuttings) from the mud, restoring its properties for recycling.
     
    The primary workflow is as follows:
     
    Collection and Pre-treatment: Used mud flows back to the collection pit or the equipment inlet.
    Primary Scalping (Shale Shaker): Mud is first fed into high-efficiency shale shakers, which use vibrating screens to separate large solids such as gravel and coarse cuttings.
    Secondary Desanding (Desander): The screened mud flows into a desander cleaner, utilizing centrifugal hydrocyclones to separate medium-sized sand particles.
    Tertiary Desilting (Desilter/Centrifuge): Finer particles are processed to ensure mud purity.
    Purification and Conditioning: Purified mud enters storage tanks where chemical additives are mixed to adjust density, viscosity, and other parameters for the next drilling phase.
    Recirculation: The optimized mud is reinjected into the borehole by mud pumps.

     
    KOSUN Trenchless Mud Recovery System Solutions
     
    As a leader in trenchless mud treatment equipment, KOSUN Machinery provides mature and reliable Mud Recovery System solutions. KOSUN systems are designed to maximize mud utilization, reduce operating costs, and meet rigorous environmental standards.
     
    Key Features of KOSUN Trenchless Mud Recovery Systems:
     
    High Integration: The HDD Recycling System integrates shale shaker, desander, and desilter functions into a compact design, saving site space and facilitating rapid deployment and mobilization.
    Stable Performance: Key components are manufactured with high-quality wear-resistant materials, ensuring reliable operation during continuous duty in complex geological conditions.
    Professional Customization: KOSUN offers various flow capacities (ranging from 200 GPM for small HDDs to 1000+ GPM for large-scale projects) and provides tailored configurations based on specific project needs.
    Environmentally Friendly: By enabling high-efficiency purification and recycling, the system significantly reduces waste mud discharge, supporting "Green Construction" goals.
     
    Choosing a KOSUN Mud Circulation System provides solid drilling fluid security for trenchless projects, serving as a powerful pillar for improving both economic benefits and environmental performance.
     
     
     

  • Slurry Separation System Technical Application and Value Analysis for Modern Underground Engineering

    As urban infrastructure development continues to accelerate, demand has surged for shield tunneling, ultra-deep pile foundations, diaphragm walls, and various trenchless pipeline projects. These modern underground projects commonly utilize slurry as a construction medium. Consequently, the management and disposal of massive volumes of generated slurry have become critical factors influencing project timelines and environmental assessments.
    Slurry Separation System, as a professional and eco-friendly solid-liquid separation solution, is emerging as the standardized technical answer to these industry pain points.

     
    Slurry Separation System Technical Core and Multi-Stage Solid-Liquid Separation Process
     
    The Slurry Separation System is not merely a single piece of equipment but an integrated joint operational workflow of various solids control devices. Its primary goal is to efficiently separate solid particles from liquid media, enabling the recycling of slurry water and the dry-volume reduction of spoils. The standard treatment process typically includes the following key steps:
    Coarse Particle Pre-treatment: Bulky solids like gravel and clay clumps are directly separated by pre-screening to ensure the stable operation of downstream equipment.
    Medium to Fine Particle Separation: The pre-treated slurry enters hydrocyclone units. Centrifugal force generated by hydrocyclone technology separates medium-sized solid particles such as sand.
    Fine Particle Treatment and Pressing: For slurry containing high levels of clay and fine particles, specific chemical agents are added for conditioning. Subsequently, decanter centrifuges or filter presses are used for deep solid-liquid separation, compressing solids into "filter cakes" with low water content.
    Fluid Reuse: The purified liquid is pumped back to the construction site for reuse.
     
    Slurry Separation System Industry Scenarios and Professional Fit for Underground Engineering
     
    Slurry Separation Systems offer high levels of customization and adaptability, widely applied in four core underground engineering sectors:
    Slurry Balance Shield TBM Treatment: In tunneling, the system handles high flow rates with high stability to ensure precise control over key indicators like slurry density and viscosity, maintaining pressure balance at the excavation face.
    Bored Piling Construction Slurry Treatment: Providing mobile and compact treatment setups for rotary drilling, forward/reverse circulation, and percussion drilling based on specific slurry characteristics.
    Diaphragm Wall Construction Slurry Treatment: Supporting trenching processes such as diaphragm walls and trench cutters to ensure slurry stability and wall integrity.
    Trenchless Construction Slurry Treatment: Facilitating Horizontal Directional Drilling (HDD) and pipe jacking by rapidly purifying slurry, ensuring project continuity, and minimizing impact on urban environment.
     
    Slurry Separation System Value Proposition Environmental Compliance and Cost Optimization
     
    The application of Slurry Separation Systems is an inevitable choice for modern engineering to comply with environmental regulations and achieve sustainable development. Its core values include:
    Environmental Benefits: Achieving source reduction and harmless treatment of construction waste, eliminating environmental pollution risks associated with traditional slurry pits, and meeting green construction requirements.
    Economic Benefits: Recycling slurry water significantly reduces the consumption costs of fresh water and additives. Simultaneously, dry-cake treatment reduces spoil transport volume and disposal fees, enhancing overall construction efficiency.

     
    Slurry Separation System Selection Advice and KOSUN Customized Design Services
     
    In summary, the Slurry Separation System is an essential component of standardized modern underground engineering. To select the most appropriate system, it is necessary to scientifically study and calculate the geological conditions of the excavation. This ensures that equipment performance meets production efficiency demands while achieving the most cost-effective solution. KOSUN provides customized designs based on diverse customer requirements and specific site conditions.
     
     
     

  • KOSUN’s WBM Drilling Waste Management System Gains Recognition from Russian Clients

    In the modern oil and gas exploration and development sector, increasingly stringent environmental regulations have made the reduction and resource-oriented treatment of drilling waste a key indicator of a contractor's core competitiveness. As an integrated solution for eliminating wellsite pollution and achieving "green drilling," the Water-Based Mud (WBM) Drilling Waste Management System has become a vital component of global drilling technology.
     
    I. Core Process Logic of the WBM Drilling Waste Management System
     
    The WBM drilling waste disposal system is an engineering framework that achieves solid-liquid separation through physical and mechanical means. Its primary objective is to efficiently extract the liquid phase from waste drilling fluids and reduce the moisture content of solids, ensuring that cuttings meet disposal standards.
     
    Collection and Conveyance: After the primary shale shaker removes large solid particles, the waste mud and cuttings are transported to the system via screw conveyors.
    Solid-Liquid Separation: Materials undergo initial separation through a drying shaker (utilizing vibration and screen filtration) to remove liquids from the cuttings.
    Chemical Treatment: Chemical agents are added and stirred in flocculation tanks to enhance subsequent separation efficiency.
    Deep Dewatering via Filter Press: The destabilized mud enters a filter press for mechanical pressure dewatering, forming "mud cakes" with extremely low moisture content.
    Recycling and Reuse: Treated liquids (effluent or reusable mud) are returned to recycling tanks for reuse; dried cuttings are utilized for wellsite reinforcement or roadbed construction.

     
    II. KOSUN’s Water Based Drilling Fluid Treatment System Highly Praised by Russian Clients
     
    On December 23, 2025, a delegation of energy industry experts from Russia was invited to visit a KOSUN drilling sludge dewatering system project site at the Chuanqing Oilfield in Chongqing, China. The focus of the inspection was to evaluate the system’s stability in treating water-based mud under complex geological conditions and the final moisture content of the solids.
    During the visit, the clients closely observed the solid discharge at the end of the process. Cuttings treated by KOSUN’s system demonstrated high stability in dryness and form, completely eliminating the "semi-fluid" state.
    The Russian client remarked: "The treatment results demonstrated by KOSUN’s system perfectly meet our technical expectations for an 'ideal solid state.' It is truly impressive."
     

     

     
    III. Economic and Environmental Value of the WBM Drilling Waste Management System
     
    Environmental Compliance: Through a closed-loop circulation mode, the system achieves "zero discharge" of cuttings and prevents mud spillage, effectively mitigating environmental regulatory risks for operators.
    Significant Reduction in Operating Costs: Efficient liquid phase recovery substantially reduces the cost of preparing new mud; meanwhile, the volume of treated solids is greatly reduced, significantly lowering downstream transportation and final disposal costs.
    Optimized Wellsite Safety and Footprint: The pitless-management approach minimizes the equipment footprint, fostering a cleaner operation site in compliance with international standards for modern "green" drilling sites.
     
    As a leading global supplier in Drilling Waste Management, KOSUN remains committed to addressing the most rigorous environmental challenges through technological innovation. The international recognition received at the Chongqing project site once again validates the international standards of its WBM Drilling Waste Disposal System in terms of process reliability and treatment performance.
    In the face of increasingly complex resource development environments, KOSUN will continue to provide customized cuttings management solutions to help global oil and gas companies achieve synergy between environmental benefits and economic returns.

  • KOSUN Cuttings Dryers Drive Efficiency and Compliance in Global Drilling

    As global environmental regulations for the energy sector become increasingly stringent, the efficient management of drilling waste has become a top priority for major oilfields. In December 2025, KOSUN once again earned international acclaim, solidifying its global leadership in the field of drilling waste management.

     
    Russian Delegation Visits Chongqing to Witness "KOSUN Quality"
     
    On December 13, 2025, a professional delegation from Russia traveled to Chongqing, China, to conduct an on-site inspection of the KOSUN Oil-Based Mud (OBM) drilling waste management System currently operating in the Chuanqing Oilfield.
    During the field visit, the Russian clients focused on the performance of the KOSUN Vertical Cuttings Dryer. After observing the dryness of the processed solids and the overall system stability, the clients spoke highly of the equipment's performance under extreme working conditions. Test results demonstrated that the system not only significantly reduced total waste volume but also achieved a high recovery rate of oil-based mud. Impressed by the customized solutions and actual treatment effects, the delegation expressed a strong intent for long-term strategic cooperation.

     
    Why KOSUN Vertical Cuttings Dryers are the Global Preferred Choice
    Specifically engineered for the treatment of oil drilling mud, KOSUN’s vertical dryer offer several core advantages:
     
    1. High Recovery, Turning Waste into Wealth
    Utilizing advanced centrifugal separation principles, the vertical cuttings dryer effectively recovers liquid phases from cuttings and reintegrates the reclaimed OBM into the active circulation system. This drastically reduces mud loss caused by shaker overflows, rig moves, or screen blinding, directly cutting overall drilling operational costs.
     
    2. Superior De-watering and Drying Performance Cutting Dryer
    The solid phase processed by KOSUN dryers is exceptionally dry, with the oil content on cuttings reduced to below 3%. This not only meets the most rigorous international discharge standards but also significantly alleviates environmental pressure during subsequent transport and disposal.
     
    3. Wear-Resistant Design Vertical Dryer for Extreme Environments
    Extended Lifespan: Inner rotor blades are coated with tungsten carbide anti-corrosive and wear-resistant materials, significantly extending service life and reducing maintenance frequency.
    Easy Maintenance: Common wear parts can be replaced from the top, and belts can be changed without moving the unit, ensuring continuous operations in complex environments like Russia or offshore platforms.
     
    4. Versatile Offshore and Onshore Application Vertical Centrifuge
    Whether for expansive land-based oilfields or challenging offshore rigs, KOSUN Cutting Dryer fulfill "Zero-Discharge" requirements, helping enterprises maximize economic benefits while ensuring total environmental compliance.

     
    From China's Chuanqing Oilfield to the Russian energy market, KOSUN remains at the forefront of drilling environmental technology. This international inspection in late 2025 reaffirms that choosing KOSUN is choosing a world-class Drilling Cuttings Management solution.
     
    If you are seeking efficient and reliable drilling waste management systems, please contact KOSUN. We are ready to provide you with integrated solutions tailored to the latest 2026 environmental standards.

  • KOSUN KD Series Slurry Separation Solutions for TBM & Piling Construction

    In modern infrastructure construction, slurry treatment efficiency and environmental compliance are critical elements of project management. The KD Series Slurry Separation Plant, developed by KOSUN, is specifically designed for circulation drilling processes and shield tunneling, providing technical support for slurry purification, recycling, and waste minimization.

     
    KD Series: Slurry Treatment Equipment for Diverse Working Conditions
     
    The KOSUN KD Series Slurry Separation Plant is dedicated to slurry purification for Slurry Shield TBM, diaphragm walls, and piling foundations. Utilizing this system optimizes slurry properties, improves hole-making quality and operational efficiency, ensures the safe operation of excavation equipment, and significantly increases the slurry recycling rate. This contributes to reducing construction costs and slurry discharge, meeting the requirements of green construction.
    The internal components and wear parts are manufactured from anti-corrosive and abrasion-resistant materials, featuring a long service life and low failure rates, making the system adaptable to various complex working conditions.
     
    Modular Design & High-Precision Slurry Separation Technology
     
    The KD Series Slurry Plant primarily consists of three core modules: the Scalping Module, the Desanding Module, and the Desilting Module.
     
    Scalping Module: Acts as a pre-screener to remove oversized rocks and coarse debris from the slurry.
    Desanding Module: Equipped with Desander Hydrocyclones (primary cyclones) and a fine-mesh shale shaker, primarily for removing sand-sized particles.
    Desilting Module: Equipped with Desilter Hydrocyclones (secondary cyclones), providing optional precision separation based on specific project requirements.
     
    The system adopts a closed-loop circulation purification method. The discharged filter cake has a low moisture content, significantly reducing environmental impact.

     
    High Integration & Versatility Drilling Mud Cleaning System
     
    KOSUN KD Series Solids control slurry separation plant offer the following design features and advantages:
     
    Modular & Compact Design: The slurry plant features a modular integrated design based on ISO container dimensions, facilitating easy logistics and rapid commissioning. The compact structure, paired with foldable walkways and platforms, minimizes the onsite footprint.
    Ease of Operation & Maintenance: The streamlined and practical process flow reduces the complexity of installation, operation, and daily maintenance for onsite personnel.
     
    KD Series: Highly Customization Solutions
     
    Adjustable Performance Parameters: The G-force, deck angle, and screen mesh size (API size) of the shale shakers are all adjustable, allowing the system to handle materials from diverse and complex geological strata flexibly.
    Capacity Configuration: Based on geological conditions and material characteristics, the system can achieve customized D50 cut-point control to meet specific separation requirements. Various throughput capacity options are available.
    Flexible Power Solutions: The system can be configured to meet different global electrical standards or equipped with an onboard diesel generator set for independent operation.
    Mobile Deployment: Supports skid-mounted integration or can be configured as a fully trailer-mounted mobile unit, enhancing mobility between different work sites.

     
    Application Fields of KD Slurry Separation Plant
     
    The KOSUN KD Series Slurry Separation System is widely applied in the following sectors:
     
    Slurry Balance Shield (TBM) slurry treatment.
    Bored Piling Construction (suitable for Rotary Drilling Rigs, Forward/Reverse Circulation Rigs, and Impact Drills).
    Diaphragm Wall Construction (suitable for Hydraulic Grabs and Trench Cutters/Hydrofrezes).
    Trenchless Technology (suitable for Horizontal Directional Drilling (HDD) and Slurry Pipe Jacking).
     

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  • China Chongqing OBM Drilling Waste Management System

    On December 13, 2025, KOSUN welcomed a Russian delegation to the CCDC operation site for a deep dive into our OBM Drilling Waste Management (DWM) technology.
    The results spoke for themselves: Our OBM system demonstrated exceptional solid-liquid separation, driving the Oil on Cuttings (OOC) down to below 3%. Deeply impressed by the system's efficiency and eco-friendly impact, the clients highly recognized KOSUN’s professional expertise in pushing the boundaries of sustainable drilling.

     

  • China Chongqing WBM Zero Discharge Drilling Waste Management System

    On December 13, 2025, Xi'an KOSUN Machinery hosted a Russian delegation for an in-depth site visit to our Water-Based Mud (WBM) Zero Discharge Drilling Waste Management System projects at the CCDC operation site in Chongqing.The clients highly recognized KOSUN’s commitment to high efficiency and environmental sustainability.




  • Centrifugal Degasser

    The centrifugal degasser (centrifugal vacuum degasser) is a high-efficiency degassing unit specifically developed for gas-cut drilling fluids. By utilizing the principle of centrifugal separation, the device rapidly isolates and discharges entrained gases from the drilling fluid, ensuring the stable operation of the circulation system. Typically installed downstream of the shale shakers, it is widely used in drilling mud treatment systems, solids control systems, and mud purification processes for trenchless engineering. The equipment not only restores mud density and maintains viscosity stability but also reduces drilling costs and enhances operational safety. Additionally, the centrifugal degasser can function as a high-power agitator, helping to maintain a homogeneous state of the mud during circulation.

    Operational Process of Centrifugal Degasser
    During operation, the centrifugal vacuum degasser generates powerful centrifugal force via rotating components, exponentially increasing the buoyancy force on gas bubbles to accelerate their rising and separation. Once the bubbles reach the liquid surface, the gas is rapidly released and further broken down by turbulent action. Subsequently, an integrated blower extracts the separated gas and discharges it into a safe zone or a flare system, achieving a high-efficiency and secure degassing operation.

    Technical Advantages of Centrifugal Degasser
    Compared to traditional vacuum degassers, the centrifugal model offers advantages such as a compact structure, flexible installation, and stable operation. The unit can be installed directly inside the mud tank without occupying additional tank-top space, making it ideal for drilling sites with space constraints. Its modular design integrates the centrifugal cylinder, filtration components, motor, and supports, facilitating easy maintenance and replacement.

    Performance and Efficiency of Centrifugal Degasser
    The centrifugal vacuum degasser is capable of handling high gas-cut conditions while maintaining high throughput, low energy consumption, and high efficiency. In continuous drilling operations, it significantly improves mud performance, prevents density anomalies caused by gas retention, and provides a more stable medium for the drilling pumps and downstream equipment.

    Applications and Future Outlook
    Currently, this equipment is widely deployed on onshore and offshore drilling platforms, geothermal wells, shale gas extraction projects, and horizontal directional drilling (HDD) operations. Its reliable performance and superior gas-liquid separation efficiency make it an indispensable component of modern mud circulation systems. Moving forward, with the advancement of automation and intelligent monitoring technologies, the centrifugal vacuum degasser will further enable real-time parameter adjustment and intelligent diagnostics, providing even more precise and efficient solutions for drilling fluid treatment.